Torque transfer device with hydrostatic torque control system

Active Publication Date: 2008-11-20
AMERICAN AXLE & MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0001]The present disclosure relates generally to a power transmission device operable to selectively transfer torque between first and second sets of dr

Problems solved by technology

For example, packaging concerns, weight and electrical power requirements of the power transmission device may make such systems cost prohibitive in some four-wheel drive applications.

Method used

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  • Torque transfer device with hydrostatic torque control system
  • Torque transfer device with hydrostatic torque control system
  • Torque transfer device with hydrostatic torque control system

Examples

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Embodiment Construction

[0012]The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the disclosure, its application, or uses.

[0013]The present disclosure is directed to a power transmission device that may be adaptively controlled for modulating the torque transferred between a rotatable input member and a rotatable output member. The torque transfer mechanism may be useful within motor vehicle drivelines and easily positioned at a variety of axial positions spaced apart from a driving axle assembly. Accordingly, while the present disclosure is hereinafter described in association with a specific structural embodiment for use in a driveline application, it should be understood that the arrangement shown and described is merely intended to illustrate an exemplary use.

[0014]With reference to FIG. 1 of the drawings, a drive train 10 for a four-wheel vehicle is shown. Drive train 10 includes a first axle assembly 12, a second axle assembly 14 ...

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Abstract

A power transmission device includes a rotatable input shaft, a rotatable output shaft and a ring gear fixed for rotation with the input shaft. A carrier is fixed for rotation with the output shaft. A pump assembly includes an inner rotor supported for rotation on the carrier and an outer rotor encompassing the inner rotor. The outer rotor is in driving meshed engagement with the ring gear. The pump provides pressurized fluid to one of first and second fluid ports. A flow restrictor is moveable to selectively restrict fluid flow relative to one of the first and second ports.

Description

BACKGROUND AND SUMMARY[0001]The present disclosure relates generally to a power transmission device operable to selectively transfer torque between first and second sets of drivable wheels of a vehicle. More particularly, the present disclosure is directed to a power transmission device with a hydrostatic torque control system.[0002]Due to increased demand for four-wheel drive vehicles, power transmission systems are more frequently being incorporated into vehicle driveline applications for transferring drive torque to the wheels. Some vehicles include a power transmission device operably installed between the primary and secondary drivelines. Such power transmission devices are typically equipped with a torque transfer mechanism for selectively transferring drive torque from the primary driveline to the secondary driveline to establish a four-wheel drive mode of operation. At least one known torque transfer mechanism includes a dog-type lock-up clutch that may be selectively engage...

Claims

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Application Information

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IPC IPC(8): F16H48/20
CPCF16D2500/10431F16D31/04B60K17/02B60K17/10B60K17/344B60K23/0808B60K2023/0866B60K2023/0858B60Y2400/73
InventorCAPITO, RUSSELL T.GILMORE, CURT D.
OwnerAMERICAN AXLE & MFG